VGA显示器字符显示

2024-04-12 08:02:01
开发
28

1.原理

64*64=256

2.1 Vga_pic.v

module Vga_pic(
	input wire			Vga_clk		,
	input wire 			sys_rst_n	,
	input wire [9:0]	pix_x		,
	input wire [9:0]	pix_y		,
	
	output reg [15:0]	pix_data
);

parameter 	CHAR_B_H=10'd192,
			CHAR_B_V=10'd208;

parameter	CHAR_W=10'd256,
			CHAR_H=10'd64;

parameter 	BLACK=16'h0000,
			GOLDEN=16'hFEC0;


wire [9:0]	char_x;
wire [9:0]	char_y;

reg [255:0] char [63:0];//表示有64个存储单元，每个单元存储的数据位宽是256

assign char_x=(((pix_x>=CHAR_B_H)&&(pix_x<CHAR_B_H+CHAR_W))
		&&((pix_y>=CHAR_B_V)&&(pix_y<CHAR_B_V+CHAR_H)))
		?(pix_x-CHAR_B_H):10'h3FF;

assign char_y=(((pix_x>=CHAR_B_H)&&(pix_x<CHAR_B_H+CHAR_W))
		&&((pix_y>=CHAR_B_V)&&(pix_y<CHAR_B_V+CHAR_H)))
		?(pix_y-CHAR_B_V):10'h3FF; 

always@(posedge Vga_clk)
	begin
		char[0]		<=256'h0000000000000000000000000000000000000000000000000000000000000000;	
		char[1]		<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[2]		<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[3]		<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[4]		<=256'h0000000000000000000000000000000000000000070000000001C00040000000;
		char[5]		<=256'h000000000000000000000000000000000000000003E000000000F00078000000;
		char[6]		<=256'h000000000000000000000380000000000000060003E000000000F8007E000000;
		char[7]		<=256'h0000038000780000000003E0000000000000078001E000000000F0003E000000;
		char[8]		<=256'h00003FE003FE0000000001F00000000000000FC001E000000000F0003C000000;
		char[9]		<=256'h0007FFF07F3F0000000001F00000000000001F8001C000000000F0003C000000;
		char[10]	<=256'h07FF81F7F83E0000000001F00000000000003E0001C000000000E0003C000000;
		char[11]	<=256'h03E1C1E1C0780000000001E0000000000000780001C000000000E0003C000000;
		char[12]	<=256'h03C1C1E000700000000001E0000000000000E00001C000000000E00038000000;
		char[13]	<=256'h01C1C1E000E00000000000E0000000000003C001C1C000000000E00038000000;
		char[14]	<=256'h01C0C1C001C00000000000E00000000000077001F1C000000000E000387C0000;
		char[15]	<=256'h01C0FDC001800000000000E00180000000187800F1C000000000E0003FFC0000;
		char[16]	<=256'h00E7F9C07B000000000000E001E000000000700071C000000000E0007FF00000;
		char[17]	<=256'h00FFC1803E000000000001E001F000000000700011C000000000E007FFC00000;
		char[18]	<=256'h00E0C1801F000000000001E003F800000000700001C000000000FF1FFE000000;
		char[19]	<=256'h00E0C3800F000000000001E003F80000000033C001C00000000FFE0FF8000000;
		char[20]	<=256'h0060C38007038000000401C007C0000000003FE001C0000000FFF00030000000;
		char[21]	<=256'h0060C700013FE000000701C00F0000000001FE0781C0000000FFE00030000000;
		char[22]	<=256'h0071FF0007FFF0000007C1C01C000000001FF003C1C000000000E00030000000;
		char[23]	<=256'h003FC200FF83F8000003E1C03800000003FF7001E1C000000000E00030000000;
		char[24]	<=256'h0030C07FF803F8000001E1C0E00000001FF8F000E1C000000000E00030000000;
		char[25]	<=256'h0000C03F9C03C0000001F1C1800000000FE0F00041C000000000E20033800000;
		char[26]	<=256'h0000C0000E0700000000F1C0000000000301F00001C0F8000000EC003FE00000;
		char[27]	<=256'h0000C4000F040000000061E0000000000003F80001DFFC000000F801FFE00000;
		char[28]	<=256'h0000FF000E000000000001E0000000000003FF0003FFFC000000F07FE3E00000;
		char[29]	<=256'h000FFE000E000000000003F000000000000777807FF800000001E07F03C00000;
		char[30]	<=256'h007FF0000E000000000003D800000000000E73BFFFC000000003E00003C00000;
		char[31]	<=256'h001EC000060000000000039C00000000001C707FE1C000000007E00003800000;
		char[32]	<=256'h0000C000060000000000038C00000000001C700C01C00000001EE03C03800000;
		char[33]	<=256'h0000C0E00600000000000786000000000038700001C00000007CE01E03800000;
		char[34]	<=256'h0000CFC00600000000000707000000000070700001C0000001F8E00707000000;
		char[35]	<=256'h0000FE0006000000000007038000000000E0700001C000000FF0E00387000000;
		char[36]	<=256'h0007F0000700000000000F01C000000001C0700001C000000FC0E001C7000000;
		char[37]	<=256'h007F80000700000000000E01E00000000300700001C000000780E000EE000000;
		char[38]	<=256'h0FFE00000700000000001E00F00000000600700001C000000300E0007E000000;
		char[39]	<=256'h0FF000000700000000001C00780000000800700001C000000000E0003C000000;
		char[40]	<=256'h07C0000007000000000038003C0000001000700001C000000000E0007E000000;
		char[41]	<=256'h0100000007000000000078003F0000000000700001C000000000E000FF800000;
		char[42]	<=256'h00000000070000000000F0001F8000000000700001C000000000E001F7C00000;
		char[43]	<=256'h00000000070000000001E0000FE000000000700001C000000000E007C3F00000;
		char[44]	<=256'h00000000070000000003C00007F800000000F00001C00000001FE01F81FC0000;
		char[45]	<=256'h000000000F000000000F800007FE00000000F00001C000000007E0FC00FF8000;
		char[46]	<=256'h000000070F000000001E000003FFC0000000700001C000000003E3E0007FF000;
		char[47]	<=256'h00000003FF000000007C000001FFF8000000600001C000000001C000003FFC00;
		char[48]	<=256'h00000000FE00000001E00000007FF8000000600001C000000001C00000000000;
		char[49]	<=256'h000000007E00000003000000000000000000200001C000000000800000000000;
		char[50]	<=256'h000000003C000000000000000000000000000000018000000000000000000000;
		char[51]	<=256'h0000000038000000000000000000000000000000008000000000000000000000;
		char[52]	<=256'h0000000010000000000000000000000000000000008000000000000000000000;
		char[53]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[54]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[55]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[56]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[57]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[58]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[59]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[60]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[61]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[62]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
		char[63]	<=256'h0000000000000000000000000000000000000000000000000000000000000000;
	end
	
always@(posedge Vga_clk or negedge sys_rst_n)
	if(sys_rst_n==1'b0)
		pix_data<=BLACK;
	else if(((pix_x>=CHAR_B_H-1'b1)&&(pix_x<CHAR_B_H+CHAR_W-1'b1))
		&&((pix_y>=CHAR_B_V)&&(pix_y<CHAR_B_V+CHAR_H))
		&&(char[char_y][10'd255-char_x]==1'b1))  //这里不能用坐标寄存器赋值，因为是时序逻辑，用坐标当条件会延迟一周期，数据和坐标不同步
		pix_data<=GOLDEN;
	else
		pix_data<=BLACK;
		
endmodule

2.1.1 tb_Vga_ctrl.v

module tb_Vga_ctrl();

reg sys_clk;
reg sys_rst_n	;
wire [15:0] Pix_data	;

wire [9:0] Pix_x	  ;
wire [9:0] Pix_y    ;
wire [15:0]rgb	  ;
wire hsync    ;
wire vsync    ;
wire CLK_out	;	  
wire locked	   ;
wire rst_n;

initial 
	begin
		sys_clk=1'b1;
		sys_rst_n<=1'b0;
		#20
		sys_rst_n=1'b1;
	end	
	
assign rst_n=(sys_rst_n&&locked);

always#10 sys_clk=~sys_clk;

// always@(posedge CLK_out or negedge rst_n)
	// if(rst_n==1'b0)
		// Pix_data<=16'h0000;
	// else if (Pix_x>=10'd0&&Pix_x<=10'd639
				// &&Pix_y>=10'd0&&Pix_y<=10'd479)
		// Pix_data<=16'hffff;
	// else
		// Pix_data<=16'h0000;

defparam CLK_gen_inst.STATE=1'b1;	
		
Vga_ctrl Vga_ctrl_inst(
	.Vga_clk	(CLK_out)	,
	.sys_rst_n	(rst_n),
	.Pix_data	(Pix_data),
	             
	.Pix_x		(Pix_x		),
	.Pix_y		(Pix_y		),	
	.rgb		(rgb		)	,
	.hsync		(hsync		),
	.vsync      (vsync    )
);


CLK_gen CLK_gen_inst(
	.sys_clk	(sys_clk	)	,
	.sys_rst_n	(sys_rst_n	),
	             
	.CLK_out	(CLK_out	)	,
	.locked		(locked		)
);


Vga_pic Vga_pic_inst(
	.Vga_clk	(CLK_out)	,
	.sys_rst_n	(rst_n),
	.pix_x		(Pix_x),
	.pix_y		(Pix_y),
				
	.pix_data	(Pix_data)
);


endmodule

2.2 vga_char.v

module vga_char(
	input wire				sys_clk		,
	input wire 				sys_rst_n	,
	
	output wire [15:0]		rgb			,
	output wire 			hsync		,
	output wire 			vsync		
);

wire CLK_out;
wire locked;
wire rst;
wire [15:0]Pix_data   ;
wire [9:0]Pix_x	   ;
wire [9:0]Pix_y	   ;

assign rst=(locked&&sys_rst_n);

CLK_gen CLK_gen_inst(
	.sys_clk	(sys_clk)	,
	.sys_rst_n	(sys_rst_n),
			
	.CLK_out	(CLK_out)	,
	.locked		(locked)
);


Vga_pic Vga_pic_inst(
	.Vga_clk	(CLK_out)	,
	.sys_rst_n	(rst),
	.pix_x		(Pix_x),
	.pix_y		(Pix_y),
	
	.pix_data   (Pix_data)
);

Vga_ctrl Vga_ctrl_inst(
	.Vga_clk	(CLK_out)	,
	.sys_rst_n	(rst),
	.Pix_data	(Pix_data),
	
	.Pix_x		(Pix_x	),
	.Pix_y		(Pix_y	),	
	.rgb		(rgb	)	,
	.hsync		(hsync	),
	.vsync      (vsync )
);

endmodule

2.2.1 tb_vga_char.v

`timescale 1ns/1ns
module tb_vga_char();

reg sys_clk;
reg sys_rst_n;

wire [15:0] rgb	;
wire hsync  ;
wire vsync  ;

initial 
	begin
		sys_clk=1'b1;
		sys_rst_n<=1'b0;
		#20
		sys_rst_n=1'b1;
	end
	
always #10 sys_clk=~sys_clk;
defparam vga_char_inst.CLK_gen_inst.STATE=1'b1;

vga_char vga_char_inst(
	.sys_clk	(sys_clk)	,
	.sys_rst_n	(sys_rst_n),
	
	.rgb		(rgb)	,
	.hsync		(hsync),
	.vsync		(vsync)
);

endmodule

原文地址:https://blog.csdn.net/m0_51133942/article/details/137459359 本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：https://www.suanlizi.com/kf/1778574254493798400.html 如若内容造成侵权/违法违规/事实不符，请联系《酸梨子》网邮箱：1419361763@qq.com进行投诉反馈，一经查实，立即删除！

阅读全部

VGA显示器字符显示

1.原理

2.1 Vga_pic.v

2.1.1 tb_Vga_ctrl.v

2.2 vga_char.v

2.2.1 tb_vga_char.v

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